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  1. 1. Satellite and Their SpecificationRADARSAT Satellites and Their SpecificationRADARSAT is Canadas first series of sophisticated Earth observation satellites.RADARSAT-1 was launched in 1995 and RADARSAT-2, in 2007. Both are equippedwith advanced radar sensors called a Synthetic Aperture Radar (SAR). The SAR is apowerful microwave instrument that transmits and receives signals to "see"through clouds, haze, smoke, and darkness, and obtains high quality images of theEarth in all weather, day or night. This provides significant advantages in viewingthe Earth under conditions that preclude observation by aircraft or opticalsatellites.RADARSAT has the unique ability to shape and steer its radar beam over an areaof up to 500 km in width. Users can select images from a variety of radar beamselections with resolutions from a few meters up to 100 m. The Canadian DataProcessing Facility can deliver radar images to users within hours of the actualdata collection. Mission planners at the Canadian Space Agency prioritizecustomer orders and develop plans for data acquisition, onboard recorder usage,data reception, data processing and/or archiving.The RADARSAT Constellation Mission (RCM) consists of a three-spacecraft fleetof Earth observation satellites. With satellites smaller than RADARSAT-2, the RCMwill provide new applications—made possible through the constellationapproach—as well as continuing to provide C band radar data to RADARSAT-2 users. Improvements include more frequent area coverage of Canada andreduced risk of a service interruption. The launch of the three satellites that willform the constellation is scheduled for 2016-17.S K Diwakar
  2. 2. Satellite and Their Specification Specification RADARSAT 1 RADARSAT 2 RADARSAT CONSTELLATIONLaunch date December November 1995 Scheduled for 2016-17 2007Owenr Canadian Space MDA MDA AgencyDesign Life 5 Years 7 Years 7 Years (each)Altitude 793-821 km 798 km 592.7 kmInclination 98.6 degrees 98.6 degrees 97.74 degreesOrbit duration 100.7 min 100.7 min 96.4 minOrbit Sun-SynchronousBandwidth 30 MHz 100 MHz 100 MHzImaging C-Band; 5.405 C-Band; 5.3 GHz. C-Band; 5.405 GHz.Frequency GHz.Spatial 1 to 100Resolution 8 to 100 meters meters 1 to 100 meters (Stripmap Mode) (Spotlight (Spotlight Mode) Mode)Beam Modes 7 12 12Polarization HH, VV, HV, HH, VV, HV, VH, HHChannels VH Compact PolarimetryLook Direction Right Right & Left Right & LeftSAR Antenna 15 m x 1.5 m 15 m x 1.5 m 6.75 m x 1.38 mDimensionsMass 679 kg 750 kg 400 kgDeployment Simple strut ExtendableMechanism Extendable deployment with a Support Support Structure kinematically decoupled Structure (ESS) internal support (ESS) structureS K Diwakar